Which CBS TV shows will be cancelled or renewed depend mostly on the series’s ratings, particularly the 18-49 demographic. Before we get to the season-to-date averages, here are the winners and losers from April 15th through April 21st — based on the coveted demo, as measured against the last original episode.

You can see a complete list of the current status of this season’s shows by checking the CBS cancelled/renewed post.

Below is a list of the regular CBS TV shows and their 2010-11 season average ratings to date. It only incorporates the ratings for original episodes and not repeats. The data is sorted by the all-important 18-49 demographic averages. The closer a show is to the bottom, the more likely it is to be cancelled. Fridays and Saturdays are the least-watched nights of TV so those shows get lower numbers.